2 washing machines and 5 refrigerators cost a total of $1998. Each washing machine costs twice as much as each refrigerator.
- What is the cost of each washing machine?
- What is the total cost of 1 washing machine and 1 refrigerator?
(a)
Cost of 1 refrigerator = 1 u
Cost of 1 washing machine = 2 x 1 u = 2 u
Cost of 5 refrigerators = 5 x 1 u = 5 u
Cost of 2 washing machines = 2 x 2 u = 4 u
Total cost of 2 washing machines and 5 refrigerators
= 4 u + 5 u
= 9 u
9 u = 1998
1 u = 1998 ÷ 9 = 222
Cost of each washing machine
= 2 u
= 2 x 222
= $444
(b)
Total cost of 1 washing machine and 1 refrigerator
= 2 u + 1 u
= 3 u
= 3 x 222
= $666
Answer(s): (a) $444; (b) $666
